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Old 05-24-2005, 17:49   #1 (permalink)
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XB GS Coupe

Howdy All

Hoping someone can answer a couple of simple questions.
I have an XB Fairmont GS Coupe (351), when I purchased it, it came with a single 3" system. The rear skirt that sits under the rear bumper has been filled so that there are no cut-outs for the exhaust to exit. (the current 3" dumps downward and is hidden behind this panel)
1st question - did the V8 XB GS (with twin systyem) come with two round cut outs in this panel ? (GT's came with rectangular cut outs I believe).
2nd question - Does that mean (if in fact the cut outs were round) that this is the same as an XC Coupe's skirt?
Finally - did any of the V8's of that era come with twin 2.5" systems, or were they all 2" twins?
I am looking to return mine to factory standard, hence the queries,
Thanks in advance
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Old 05-24-2005, 19:28   #2 (permalink)
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Re: XB GS Coupe

I'm not sure, but I would have thought that the GS V8's would have come out with a single system.
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Old 05-24-2005, 21:29   #3 (permalink)
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Re: XB GS Coupe

my understanding is that any car with a fact twin pipe had a twin round opening rear panel. Square was only GT.
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Old 05-24-2005, 21:56   #4 (permalink)
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Re: XB GS Coupe

Quote:
Originally Posted by XW_Fairmont
my understanding is that any car with a fact twin pipe had a twin round opening rear panel. Square was only GT.
Correct, and the rear panel is removable.
Remember GS was a cosmetic option avaliable on any Falcon/Fairmont from 6cyl to 351. Exhaust was not part of the option pack (for obvious reasons) but twin 2"? was an option on the V8 falcon/fairmonts.
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Old 05-25-2005, 05:03   #5 (permalink)
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Re: XB GS Coupe

Somthing to note is that the twin exhaust cars have a different diff housing to the single exhaust. Cars with the single exhaust have the brake pipe go from the body to a union on the axle housing. Twin exhaust cars have a special bracket with the union on it that bolts to the front of the diff centre on 9 inch or onto the cover plate of BW diffs. Also the breathers are diffrent, single exhaust cars have a pipe on the left side and dual exaust cars have a breather cap.

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Old 05-27-2005, 01:21   #6 (permalink)
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Re: XB GS Coupe

Quote:
Originally Posted by jg66me
Somthing to note is that the twin exhaust cars have a different diff housing to the single exhaust. Cars with the single exhaust have the brake pipe go from the body to a union on the axle housing. Twin exhaust cars have a special bracket with the union on it that bolts to the front of the diff centre on 9 inch or onto the cover plate of BW diffs. Also the breathers are diffrent, single exhaust cars have a pipe on the left side and dual exaust cars have a breather cap.

Steven B
Agreed. Also, the easy one is the muffler heatsheilds spotwelded under the floorpan below the rear seat.......
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Old 05-27-2005, 01:45   #7 (permalink)
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Re: XB GS Coupe

Quote:
Originally Posted by jg66me
Somthing to note is that the twin exhaust cars have a different diff housing to the single exhaust. Cars with the single exhaust have the brake pipe go from the body to a union on the axle housing. Twin exhaust cars have a special bracket with the union on it that bolts to the front of the diff centre on 9 inch or onto the cover plate of BW diffs. Also the breathers are diffrent, single exhaust cars have a pipe on the left side and dual exaust cars have a breather cap.

Steven B
What does the breather cap look like? I converted my car from single to dual exhaust brake pipes. My mates XC has factory dual exhaust and he just has a bolt in there. His car is pretty original, or so I thought. I copied the brake pipes on it. I was thinking of getting one of those K&N or similar breathers with the 5/16" inlet and hose clamp.
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